20121322001 has 16 divisors (see below), whose sum is σ = 22911984000. Its totient is φ = 17491393920.

The previous prime is 20121321911. The next prime is 20121322027. The reversal of 20121322001 is 10022312102.

It is a happy number.

It is not a de Polignac number, because 20121322001 - 2³⁰ = 19047580177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20121322051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 959375 + ... + 980123.

It is an arithmetic number, because the mean of its divisors is an integer number (1431999000).

Almost surely, 2^20121322001 is an apocalyptic number.

It is an amenable number.

20121322001 is a deficient number, since it is larger than the sum of its proper divisors (2790661999).

20121322001 is a wasteful number, since it uses less digits than its factorization.

20121322001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24616.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 20121322001 its reverse (10022312102), we get a palindrome (30143634103).

The spelling of 20121322001 in words is "twenty billion, one hundred twenty-one million, three hundred twenty-two thousand, one".